Ingot-mold-making machine



(No Model.) 3 Sheets-Sheet 1. G. S. & J. H. RAHLING. INGOT MOLD MAKINGMACHINE.

No. 461,487. PatentedOct. 20, 1891.

(No Model.) 3 Sheets-Sheet 2.

G. S. & J. H. RAHLING.

INGOT MOLD MAKING MAGHINE.

,48'7. Patented O0t.20,1891.

(No Model.) 3 Sheets-8heet 3. G. S. & J. H. RAHLING.

INGOT MOLD MAKING MACHINE.

No. 461,487. Patented 0m. 20, 1891.

UNITED STATES PAT NT OFFICE.

CHRISTOPHER S. RAHLING AND JOHN H. RAHLING, OF CHICAGO, ILLlNOIS.

INGOT-MOLD-MAKING MACHlNE.'

SPECIFICATION forming part of Letters Patent No. 461,487, dated October20, 1891.

Application filed February 24, 1891. Serial No. 382,359. (No model.)

tive View showing a part of the operating mechanism. Fig. 4 is ahorizontal section; and Fig. 5 is a detail, being a side elevation of apart of the operating mechanism.

Our invention relates to molding-machines, and particularly to machinesdesigned to shape the interior of molds to be used in casting articlesof various kinds.

Our invention has for its object to provide a machine for shaping thesand in molds to be used in casting molds for. steel ingots; but

itmay, however, be used in' shaping various kinds of molds in which theinterior of the shape desired.

YVe accomplish our object as shown in the drawings and as hereinafterspecified.

That which We regard as new will be set forth in the claims.

Similar letters of reference refer to similar parts throughout thedrawings.

In the drawings, A indicates the exterior shaping surface or frame ofthe machine, which is of the length and shape of the ingotmold, and ismade of iron, steel, or other suitable material. The molding-frame A isvertically divided into four equal rectangular sections a, as best shownin Figs. 2 and 4, the parts being so constructed as to unite close'y andsmoothly, asshown.

B indicates a central rod or shaft,which is.

located at the center of the frame A, and to which each section dot theframe is secured. The shaft B is square and hollow, made of iron, steel,or other suitable material, and extends from a short distance above thetop of the frame A to a point below the frame, as best shown in Fig. 1.

B indicates an extension of the shaft B,

which is suitably secured thereto atits lower of the sections.

end and projects downward, as best shown in Fig. 3, for convenience inoperating the device. Each section a is secured to the shaft B by strapsb, which are arranged in pairs, as best shown in Fig. 2, and of whichseveral pairs are employed on each section, as best shown in Fig. 1. Thestraps b are hinged to the sections a at the corners of the sections byhinges b, which are mounted on plates 0, which are secured by screws 0to lugs a, formed in the corners of the sections a. The straps b1nay,'however, be hinged to the sections at in any other suitablemanner. The straps b are all of equal length and are hinged to the shaftB at a point some distance above the plane of their connect-ion with thesections a, so that when the sections Ct lie close together the strapswill be downwardlyand outwardly inclined, as best shown in Fig. 1. Bythis construction, when the frame A is supported and the shaft Bis drawndownward, the straps b will be drawn into a more nearly horizontalposition, whereby the sections a of the frame will be forced outward, asindicated in dotted linesv in Fig. 1.

D D represent flat plates of suitable metal, one of which is placed overthe meeting edges of each pair of sections a, as best shown in Fig. 2.The plates D are of equal length with the frame A and are of such widththat when the sections a are separated to their greatest extent theplates D will cover the space opened by the separation of the edges- Theplates D are held in position on the sections a by means of horizon talcurved springs E and bolts 6. The ends of the springs E bear upon theinner sides of adjacent sections a and are connected to the plates D bythe bolts 6', which pass through the springs at their center and throughholes in the meeting edges of the sections a into the plates D, as bestshown in Figs. 1 and 2.

When the sections are separated, as above described, the springs E willby their tension hold the plates D in close contact with the exterior ofthe sections, the sections sliding on the inner surfaces of the plates.When the sections are again closed, the plates will resume the positionshown in Fig. 2.

The plates D are strengthened by means of transverse bars 0, which arefitted in suitable grooves or depressions in the outer surbottom of theframe A upon its support when the sections a are being separated orclosed, each section a is provided at the bottom with a caster or rollerfiwhich projects sufficiently below the lower edge of the section to aidin carrying the section out and back.

F indicates aplatform, which is located at I any suitable height abovethe ground, and is adapted to support the molding machinery. Theplatform F is mounted on posts or columns G, or in any other suitablemanner,

. and is provided at its center with an opening sufficiently large topermit of the passage of the frame A.

Upon the platform F is placed a flat table H, which is divideddiagonally into two equal sections, which sections are pivoted at oneend to the platform F and are adapted to swing horizontally outward, asindicated by dotted lines in Fig. 4, their other ends being providedwith a suitable lock or fastening g, by means of which the sections maybe secured together in closed position.

The table H is provided at a point over the opening in the platform Fwith a square opening, which is somewhat smaller than the frame A.

In use the frame A is placed over the openings above described, theshaft B extending through the openings and the frame A resting upon thetable H around the opening in said table.

The box which is to contain the sand to be molded is placed on the tableH, over or around the frame A. Molding-sand is then poured in andslightly packed. The shaft B is then drawn downward, causing thesections a to move outward on the rollers f, therebypressin g the sandinto the proper form. When the sand is sufficiently compressed, theshaft B is returned to its raised position, closing the sections a. Thebox containing the'molded sand may then be removed and the operationrepeated. By reason of the construction above described great power canbe brought to bear upon the sand to tightly pack it intov place.

The plates D cover the openings between the edges of the sections a andmold the sand at those points. WVhen the sand has been pressed intoshape, the box containing it is removed and another substituted.

T T indicate lugs or cars formed on the exterior of the frame A at thetop, as best shown in Figs. 2 and 3. The lugs T are preferably formedonly on two opposite sides, as shown, their object being to formcorresponding depressions in the molded sand adapted to form similarlugs on the upper part of the outer su rface of the ingot-mold, by meansof which the in got-mold may be lifted.

The shaft B is held in its raised position by means of acounterbalancing-weight I, which is provided with a rope t', adapted towork in pulleys J J, mounted on a cross-beam K, secured to the columnsG. The end of the rope i is secured at some suitable point to theextension B of the shaft B. By this construction the shaft B will beheld at its raised position in the absence of pressure to lower it.

The extension B of the shaft B is held in its perpendicular position byrollers L, mounted on cross-beams K K, as best shown in Fig. 3, betweenwhich rollers the shaft B isadaptcd to move.

M indicates a lever for depressing the shaft B, which lever is attachedat m to one of the supports G at a point lower than the extension B, sothat when the lever is attached to the extension B of the shaft B bydepressing its outer end the shaft B will be drawn downward. In order todraw the shaft B perpendicularly downward, the lever M passes over aroller or pinl on the extension B of the shaft B, whereby the lever Mwill move over the roller Z as it is moved up or down. The outer encl ofthe lever M is pivoted to a connecting-rod or pitman N, which is mountedupon a crank-shaft O, operated through a gearwheel P, as bestshown inFig. 5. The gearwheel P is operated by any suitable driving mechanism.By operating the gear-wheel P the crank will be rotated, causing theraising and lowering of the lever M, each rotation ofthe crank effectinga complete operation of the molding-machine.

R indicates a horizontal bar, which is attached to the shaft Bimmediately below the platform F, and is provided with anupwardly-extending rod r and handle 0", by means of which the shaft Bmay be depressed by hand when the machine is not in use.

That which we claim as new, and desire to secure by Letters Patent, is

1. The combination of a'platform and an exterior box for containing thesand to be molded with a laterally-expansible sectional frame arrangedabove and supported by the platform, a central lengthwise-movable shaft,

a series of straps pivoted to the frame-sections and to the shaft, andmeans for moving the shaft lengthwise to expand the frame and shape thesand in the box, substantially as described.

2.-The combination of a platform having an opening, a table on theplatform, and an exterior box for containing the sand to be molded witha laterally-expansible sectional frame adapted to pass through theopening in the platform and rest on the table, alengthwisemovable shaftextending through the frame and the opening in the platform, a series ofstraps connected to the frame-section and to the shaft, devices forautomatically elevating the shaft, and means for lowering the shaftagainst the power or force of tlie

